Early 20th century. A farmer in Scotland, passing by a bog, rescued a boy who was stuck in a bog without legs. The next day, a rich gentleman came to the farmer's house in a richly equipped carriage, thanked him for saving his son, and offered him a reward, but the farmer refused to accept the reward, saying, "I only did what everyone should do." At this time, the gentleman saw the farmer's son coming out of the house and said to the farmer, "Let me make you an offer, please don't refuse. I will take your son to London and make him an educated person. You are a good person, so your son and you too, and I am sure that he will become a person who will not make me sad.
Many years passed, the farmer's son finished school, and then graduated from the Medical University. He discovered the unprecedented "penicillin" vaccine and became famous all over the world. His name is Alexander Flemming. At the same time, in a London hospital, a serious patient with acute pneumonia was saved by the power of Fleming's "penicillin", and that person was Winston Churchill, the son of Randolph Churchill, who later became the Prime Minister of England. It is said that Winston Churchill liked to say that "everything that is done comes back."